QuantConnect - QuantConnect provides a free algorithm backtesting tool and financial data so engineers can design algorithmic trading strategies. We are democratizing algorithm trading technology to empower investors.
MetaTrader5 - World-leading multi-asset platform that allows trading Forex, Stocks, Futures and CFDs.
quantra - A public API for quantitative finance made with Quantlib
TradingView - The best charting tool for crypto and stocks
Quantopian - Your algorithmic investing platform
ProRealTime - Online trading, charting and technical analysis of stocks, futures, forex and commodities.